# Is rollup-plugin-sourcemaps ESM-only? Can you require() it?

> rollup-plugin-sourcemaps@0.6.3 ships CommonJS and ESM builds. Dual package — require() works on every Node.js version we test; import works too.

Rollup plugin for grabbing source maps from sourceMappingURLs

Last verified Sep 9, 2026 against rollup-plugin-sourcemaps@0.6.3.

rollup-plugin-sourcemaps publishes both a CommonJS entry and a native ESM entry (ESM added in 0.6.0). require("rollup-plugin-sourcemaps") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10.0.0. import "rollup-plugin-sourcemaps" works alongside it.

## What to do

1. Nothing to change. require("rollup-plugin-sourcemaps") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10.0.0. import * as rollupPluginSourcemaps from "rollup-plugin-sourcemaps" works alongside it; use named imports for what the ESM entry exports.
2. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 0.6.3 (Oct 7, 2020)
- Module format: Dual (CommonJS + ESM)
- Last CommonJS version: 0.6.3
- Native ESM since: 0.6.0
- TypeScript types: bundled
- Node engines: >=10.0.0
- Weekly downloads: 627K
- License: MIT

## Runtime test results for rollup-plugin-sourcemaps@0.6.3

Installed and executed on Sep 9, 2026 with require("rollup-plugin-sourcemaps") from a CommonJS file and import "rollup-plugin-sourcemaps" from an ES module.

| Runtime | require("rollup-plugin-sourcemaps") | import "rollup-plugin-sourcemaps" |
|---|---|---|
| Node.js 18 | works | works |
| Node.js 20 | works | works |
| Node.js 22 | works | works |
| Node.js 24 | works | works |
| Node.js 26 | works | works |
| Bun 1.4.0 | works | works |

## How to import rollup-plugin-sourcemaps

ES modules:

```js
import * as rollupPluginSourcemaps from "rollup-plugin-sourcemaps";
```

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS:

```js
const rollupPluginSourcemaps = require("rollup-plugin-sourcemaps");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (19 versions; the newest 19 shown).

| Versions | Format | First published |
|---|---|---|
| 0.6.0 – 0.6.3 | Dual (CommonJS + ESM) | Apr 30, 2020 |
| 0.1.0 – 0.5.0 | CommonJS | Jun 19, 2016 |

## Frequently asked

**Is rollup-plugin-sourcemaps ESM-only?**

rollup-plugin-sourcemaps@0.6.3 ships CommonJS and ESM builds. rollup-plugin-sourcemaps publishes both a CommonJS entry and a native ESM entry (ESM added in 0.6.0). require("rollup-plugin-sourcemaps") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10.0.0. import "rollup-plugin-sourcemaps" works alongside it.

**Can I require rollup-plugin-sourcemaps?**

Yes. rollup-plugin-sourcemaps ships a CommonJS entry alongside the native ESM entry. require("rollup-plugin-sourcemaps") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10.0.0.

**Does rollup-plugin-sourcemaps work in Bun?**

Yes. import "rollup-plugin-sourcemaps" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does rollup-plugin-sourcemaps ship TypeScript types?**

Yes. rollup-plugin-sourcemaps bundles its own type declarations; no @types package is needed.

## Links

- [rollup-plugin-sourcemaps on npm](https://www.npmjs.com/package/rollup-plugin-sourcemaps)
- [Source repository](https://github.com/maxdavidson/rollup-plugin-sourcemaps)
- [HTML version](https://canirequire.com/package/rollup-plugin-sourcemaps/)
- [JSON version](https://canirequire.com/package/rollup-plugin-sourcemaps.json)

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